liupc edited a comment on issue #23672: [SPARK-26750]Estimate memory overhead with multi-cores URL: https://github.com/apache/spark/pull/23672#issuecomment-459602706 Thanks, I find this the documented default, so I think you are right. but I was curious about how this default 0.1 is generated, by experimatal tests? is there any docs about how the experiment is done? does it taking the number of cores into account when do these tests?
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